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Goodwill (Tables) | 12 Months Ended
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Dec. 31, 2020
Disclosure of detailed information about goodwill [Abstract] |
Disclosure of detailed information about goodwill | A reconciliation of the changes in the carrying amount of intangible assets is as follows:
| Coal rights | Software and other | Power sale contracts | Intangibles under development | Total
Cost |  |  |  |  |
As at Dec. 31, 2018 | 185 |  | 339 |  | 237 |  | 46 |  | 807 |
Assets transferred to right-of-use assets on implementation of IFRS 16 (Note 19) | — |  | (5) |  | — |  | — |  | (5) |
Additions | — |  | — |  | — |  | 14 |  | 14 |
Acquisition | — |  | 1 |  | — |  | 15 |  | 16 |
Disposals (Note 4(R)) | (37) |  | (1) |  | — |  | — |  | (38) |
Change in foreign exchange rates | — |  | (4) |  | (1) |  | (1) |  | (6) |
Transfers | 1 |  | 48 |  | 14 |  | (63) |  | — |
As at Dec. 31, 2019 | 149 |  | 378 |  | 250 |  | 11 |  | 788 |
Additions | — |  | — |  | — |  | 14 |  | 14 |
Acquisition (Note 4(K)) | — |  | — |  | 37 |  | — |  | 37 |
Disposals | — |  | (1) |  | — |  | — |  | (1) |
Change in foreign exchange rates | — |  | — |  | (2) |  | — |  | (2) |
Transfers | — |  | 35 |  | (16) |  | (22) |  | (3) |
As at Dec. 31, 2020 | 149 |  | 412 |  | 269 |  | 3 |  | 833 |
Accumulated amortization |  |  |  |  |
As at Dec. 31, 2018 | 117 |  | 221 |  | 96 |  | — |  | 434 |
Assets transferred to right-of-use assets on implementation of IFRS 16 (Note 19) | — |  | (3) |  | — |  | — |  | (3) |
Amortization | 8 |  | 31 |  | 11 |  | — |  | 50 |
Disposals (Note 4(R)) | (9) |  | (1) |  | — |  | — |  | (10) |
Change in foreign exchange rates | — |  | (1) |  | — |  | — |  | (1) |
Transfers | 1 |  | (1) |  | — |  | — |  | — |
As at Dec. 31, 2019 | 117 |  | 246 |  | 107 |  | — |  | 470 |
Amortization | 8 |  | 28 |  | 15 |  | — |  | 51 |
Disposals | — |  | (1) |  | — |  | — |  | (1) |
Transfers | — |  | (1) |  | 1 |  | — |  | — |
As at Dec. 31, 2020 | 125 |  | 272 |  | 123 |  | — |  | 520 |
Carrying amount |  |  |  |  |
As at Dec. 31, 2018 | 68 |  | 118 |  | 141 |  | 46 |  | 373 |
As at Dec. 31, 2019 | 32 |  | 132 |  | 143 |  | 11 |  | 318 |
As at Dec. 31, 2020 | 24 |  | 140 |  | 146 |  | 3 |  | 313 |
Goodwill acquired through business combinations has been allocated to CGUs that are expected to benefit from the synergies of the acquisitions. Goodwill by segments are as follows:
As at Dec. 31 | 2020 | 2019
Hydro | 258 |  | 258 |
Wind and Solar | 175 |  | 176 |
Energy Marketing | 30 |  | 30 |
Total goodwill | 463 |  | 464 |

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- Definition The disclosure of the reconciliation of changes in intangible assets and goodwill. [Refer: Intangible assets and goodwill] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 38 -IssueDate 2019-01-01 -Paragraph 118 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2019-en-r&anchor=para_118&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition Disclosure of detailed information about goodwill [Abstract] + References No definition available. + Details
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